A New High Sensitivity Remanent Magnetometer
- 1 June 1949
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 20 (6) , 429-434
- https://doi.org/10.1063/1.1741560
Abstract
The remanent magnetometer, sturdily constructed for use in a mobile field laboratory, is capable of measuring magnetic moments of rocks as small as 2×10−8 c.g.s. unit per cc. A sample of rock of 25‐ to 50‐cc volume is rotated over a pick‐up coil at 10 cycles per second, and the induced alternating voltage, after amplification, is measured in both intensity and phase, and the direction and intensity of magnetization determined. The apparatus is calibrated with a needle‐magnet of known magnetic moment. It has been used successfully in measurements of polarization of the glacial clays of New England and sedimentary rocks of the western states.Keywords
This publication has 4 references indexed in Scilit:
- Rock Magnetism as a Clue to Earth's Magnetic HistoryPhysical Review B, 1949
- Pre‐history of the Earth's magnetic fieldTerrestrial Magnetism and Atmospheric Electricity, 1948
- Theory of the Structure of Ferromagnetic Domains in Films and Small ParticlesPhysical Review B, 1946
- The Limiting Sensitivity of an Alternating-Current Method of Measuring Small Magnetic MomentsReview of Scientific Instruments, 1938